Certainty Herbicide - 1.25 oz.

$91.45

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5 out of 5 stars Rating: 4.9

9 Reviews | 36 Q&A

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Certainty Herbicide - 1.25 oz. bottle (1.25 oz)

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Certainty Herbicide - 1.25 oz.

Certainty Turf Herbicide is a selective, post-emergent herbicide that controls labeled weeds in residential and commercial turf.

Certainty Turf Herbicide is easy and flexible to use and has excellent control of both purple and yellow nutsedge. Combined with a non-ionic surfactant, Certainty Turf Herbicide attacks nutsedge through broadcast applications or spot treatments.

With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.

Only for use on the following warm season grass types: Bermdagrass (common or hybrid), Bahiagrass, Buffalograss, Centipedegrass, Kikuyugrass, St. Augustinegrass, Seashore paspalum, and Zoysiagrass.




Certainty Turf Herbicide controls tough weeds in residential and commercial turf.

  • In "warm" season turf, Certainty Turf Herbicide will control broadleaves, sedges and kyllinga.

Certainty Turf Herbicide is easy and flexible to use and has excellent control of both purple and yellow nutsedge. Combined with a non-ionic surfactant, Certainty Turf Herbicide attacks nutsedge through broadcast applications or spot treatments.

With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.

*Note: Certainty Turf Herbicide is not labeled for golf course putting greens or within 4 feet of the putting green.

Rating Snapshot

5 stars   8
4 stars   1
3 stars   0
2 stars   0
1 star   0

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Average Customer Rating
5 out of 5 stars (9)

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  • 10 of 10 people found this review helpful:

    5 of 5 stars  Kills poa annua in centipede
    By Rich in Columbia, SC on 02/22/2015
    Verified Purchase

    After fighting poa annua for the last few years it is good to find something that works. It seems expensive for such a small amount of product, but the amount used per gallon of water is so small it is cost effective. Works much better than the atrazine I used before. Great product and produced results in only 2 weeks.

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  • 5 of 7 people found this review helpful:

    5 of 5 stars  It killed Johnsongrass!
    By in Southern Illinois on 07/01/2013
    Verified Purchase

    After trying many products to kill johnsongrass, tried Certainty and in 10 days the grass was dead!

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  • 5 of 5 people found this review helpful:

    5 of 5 stars  Green Kyllinga in Florida St Augustine grass
    By Homeowner in Florida on 04/30/2014

    I applied Certainty to my St Augustine lawn in April. The St Augustine did not show any signs of stress. Kyllinga did not shrivel up and die the next day, but it did stop coming up in my lawn. I'm very satisfied. The rest of the 1.25 oz bottle should last me for years to come so it is cost effective in the long run.

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  Awesome
    By Jeff in Montgomery, Alabama on 07/07/2015

    I had a bad infestation on nutsedge and we were getting a lot of rain everyday decided to mix it up and give it a shot in front of the rain one day only three hours before receiving half an inch of rain but within 7 days the sedge is already 90% dead. Well worth the money

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  Quackgrass Dead On Arrival!
    By Ken in Indian Trail on 05/26/2016

    Used properly per instruction, quack grass started turning yellow on 3rd day, bright yellow by the 7 day, and wilting over 2 weeks out. Must use the Dyne Amic with this product. See my other review for (Drive) product. Newly planted Princess 77 lawn. Killed all the Quackgrass, the Bermuda kept smiling!

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  • 3 of 4 people found this review helpful:

    5 of 5 stars  The best results ever!
    By Dennis in Leland, NC on 08/08/2015
    Verified Purchase

    This stuff really works. Results are slow, 2-3 weeks, but follow directions, use a good quality surfactant, and watch weeds disappear. Even with the blistering heat from this summer, no turf damage, no discoloration- except for the dying weeds, both sedge/grasses and broadleaf! In my centipede lawn, the best results I've ever achieved.

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Expensive but works well
    By Jim in Chadds Ford, PA on 05/12/2015
    Verified Purchase

    Effective at controlling quickgrass.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Great product
    By Shareem in Fort Worth TX on 05/08/2016

    Certainty worked better than I expected . I used it to control Tall Fescue in my Bermuda during spring .It worked incredibly well ! It also destroyed crabgrass nuts edge and every other weed listed on its label growing in my yard . Buy it . You will not be disappointed .

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  • 1 of 1 people found this review helpful:

    4 of 5 stars  Good but a bit slow
    By Charles in Athens AL on 08/30/2016

    Another product, like Metsulfuron, that I use to remove cool season grasses from Bermuda, but which also works on sedges, and is similarly slow like Metsulfuron. Wait a week or two in spring and the poa will die off. Together with AmTide in the same bottle with surfactant, you can eradicate fescue and poa. When mixed with MSMA later in summer, it will really knock out dallisgrass, though you could just get rid of dallis with only MSMA. It comes with a little measuring spoon in the box to help you get the right amount per gallon of water.

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Most Helpful Q&A's

05/02/2013 Dean from Iowa

QControlling quackgrass in Kentucky Bluegrass
The Michigan State University extension website says "If your lawn is primarily Kentucky bluegrass, there is a selective herbicide that will remove the quackgrass without killing the rest of your lawn. This product is only available to professional lawn care operators, and they need to make two applications on a 14-day interval. The name of the product is Certainty." However, your Q&A section includes an answer that says Certainty is not "labeled for use on Kentucky Bluegrass." Can you clarify the apparent disconnect?

ASince we do not make this product we have to go by what the manufacturer supplies us with. Kentucky Bluegrass is not on the label so we have to assume it cannot be used on that type of grass. However, here is Monsanto's telephone number 800-332-3111. We recommend contacting Monsanto and speaking with the customer service agent there to verify if this product is safe for kentucky Bluegrass.

8 of 8 people found this answer helpful.
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03/16/2012 Jesse from Des Moines, Ia

QQuackgrass - Is Q4 effective at killing quackgrass?
Are there any chemicals available through your company that can eradicate quackgrass?

AQuackgrass is a grassy weed, so you need a product labeled for grassy weeds.  Certainty is our most popular product for quackgrass and other grassy weeds.

7 of 8 people found this answer helpful.
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05/12/2011 Pete

QHow soon can I re-seed after application of Certainty?
Live in MA. Have a predominantly KBG lawn, with some tall fescue creeping in places that I would like to get rid of. After application, how soon can I re-seed any bare spots or over-seed the whole lawn? Thanks!

AAccording to the product label, you should wait at least 3 weeks before re-seeding or over-seeding with Certainty.

6 of 8 people found this answer helpful.
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06/25/2010 Michael

QI am applying Certainty Herbicides and the instructions indicate I need Non-ionic surfactant. What would be an example of that?
I will be applying this to my bluegrass lawn.

AWe offer DyneAmic Surfactant on our website. DyneAmic is a high quality non-ionic surfactant that greatly enhances the effectiveness of Certainty and other herbicides and fungicides on lawns, ornamentals, trees and landscape areas. The surfactant helps penetrate the natural waxy tissue of plants.

5 of 6 people found this answer helpful.
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04/19/2012 Brian from Marysville, Oh

QHow do I kill tall fescue in a KBG lawn?
I thought I was going to be able to use Certainty to kill the tall fescue in my KBG lawn until I read the note on the label change after 2011. What is the right product to use now?

AWe do not carry a product that will take fescue out of kentucky blue grass.  Unfortunately they are so closely related that you cannot selectively remove it with any product that we are aware of.  Your best option in this scenario is to kill the fescue with a Ranger Pro (glyphosate) product and then re-seed with your KBG.

4 of 4 people found this answer helpful.
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Most Recent Customer Questions

10/13/2015 Bob from Elkhorn

QWill Certainty kill tall fescue?

A

Yes, Certainty is labeled to target Tall Fescue applying at a rate of 3 - 5 small scoops or 1 - 2 large scoops per gallon of water per 1,000 sq ft.

1 of 1 people found this answer helpful.
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04/30/2014 Andrew from Arkansas

QCan certainty be sprayed in spring when bermuda grass is starting to come out of dormancy
And also can it be sprayed all year around?

AYes, you can apply Certainty Herbicide in the spring once Bermuda grass is coming out of dormacy. However, you must be sure that there has been 3 consecutive days with soil temperatures of atleast 55 degrees to ensure that the Certainty Herbicide will be effective.

2 of 2 people found this answer helpful.
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11/18/2013 Bill from Marietta, Ga

QThis product says it will kill poa annua. Is it safe for bermuda lawns?
The HALTS I put down twice did nothing to control poa annua. I want to kill it before it takes over the lawn like last winter.

ACertainty has been shown to be safe on Bermuda grasses.

3 of 3 people found this answer helpful.
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08/27/2013 Barry from Ga

QHow much Certainty do I need to spot spray weeds including nut grass?

A

The amount of Certainty will depend on what type of turfgrass you will be applying the product to and the amount of water you use will vary as the water acts as the carrier. On average with herbicides you will use 2-3 gallons of water per 1000 sq/ft to give sufficient coverage. Please click on the product label link for specific mixing and application instructions.

2 of 3 people found this answer helpful.
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06/03/2013 George from Hardeeville, Sc

QHow many sq. ft. does a 1.25 oz. bottle of Certainty herbicide cover? .
I am trying to get rid of kyllinga weeds in my centipede lawn and need to know how much coverage I will get with this 1.5 oz bottle of Certainty herbicide.

AOne bottle can treat from 10,000 square feet to over 35,000 square feet depending on the weed and grass you are treating. For the selective control of Kyllinga use 1.25 ounces per acre on Centipede lawns. The amount of water you use will vary as the water acts as the carrier. On average with herbicides you will use 2-3 gallons of water per 1000 sq/ft to give sufficient coverage.

2 of 2 people found this answer helpful.
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06/02/2013 Mark from Nacogdoches, Tx

QCan Certainty be applied to Bermuda grass?

AYes, Certainty can be applied to established warm season grasses such as Bermuda Grass. Please refer to the product label for application instructions.

2 of 2 people found this answer helpful.
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04/23/2012 Garry from Lumberton, N.c_

QMy zeon zoysia lawn (sodded last summer) is being taken over by water grass

ACertainty is a selective herbicide that kills many grassy weeds which water grass is a generic term for, in warm season grasses like zoysia.  It will kill the grassy weeds and not the zoysia grass.

2 of 2 people found this answer helpful.
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02/01/2012 Earl

QWhat do you have to get rid of Poa Annua and nutsedge?

APoa Annua is actually annual bluegrass, a type of grassy weed.  Certainty is our most popular product for Poa Annua and Nutsedge control.

3 of 5 people found this answer helpful.
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01/17/2012 Larry from Avon Indiana

QDoes Certainty kill Kentucky blue grass?
Will it kill grassy weeds withot harming KBG?

ACertainty is not labeled for use on Kentucky Bluegrass. We do carry several herbicides such as SpeedZone Lawn Weed Killer Concentrate and Tenacity Herbicide which are labeled for use on Kentucky bluegrass. We strongly recommend that you read over the product label of the product you choose (product label link will be under the picture of the product on each individual product page) to make sure you can use the product on Kentucky Bluegrass and to make sure the weeds you are trying to eliminate are listed. You can search Kentucky Bluegrass on our online store to see other products that may meet your needs.

3 of 3 people found this answer helpful.
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04/29/2010 Brian

QHow much Certainty Herbicide do I need to get rid of broad leaf weeds?
I have a normal turf lawn, and am interested in getting rid of the broad leaf weeds. I need to cover for a lawn of 3 acres.

ACertainty should only be used on certain types of warm season grasses.  We can better answer your question if you can tell us what type of grass you mainly are trying to control the broad leaf weed in?

1 of 1 people found this answer helpful.
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See all 36 questions »


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